Resume import with a different HEALPix order

[camposandro]

This pull request closes #261.

• Resolves the redundancy surrounding the overwrite / resume import arguments, removing overwrite in favor of resume. When resume is True (default) we attempt to read any intermediate files and continue the import pipeline from an earlier execution. If it is False, we delete any existing intermediate files, we reset the output directory, and start the pipeline from scratch.

• Resolves the issue of loading incompatible histogram binaries whenever trying to resume the import pipeline with a different HEALPix order. We now raise an error so that the user knows that they should set resume=False.

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[camposandro]

I built a small notebook showcasing the import process for MagE_hipscat, the catalog in Julie's workflow. It reproduces the scenario where we run the pipeline at highest pixel order 2, stopping it during the reducing stage, and then proceeding to import the catalog at constant pixel order 3.

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Codecov Report

Attention: Patch coverage is 96.66667% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 99.43%. Comparing base (79b1af6) to head (d0830da).

Files	Patch %	Lines
src/hipscat_import/catalog/resume_plan.py	96.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #280 +/- ## ======================================= Coverage 99.42% 99.43% ======================================= Files 24 24 Lines 1221 1234 +13 ======================================= + Hits 1214 1227 +13 Misses 7 7 ```

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